Nasaruddin, R. R. . “A Systematic Literature Review on the Effects of Synthesis Conditions to the Physicochemical Properties of Activated Carbons and Their Performance in Methylene Blue Adsorption”. Malaysian Catalysis-An International Journal, vol. 1, no. 2, Feb. 2022, pp. 12-30, http://adum.um.edu.my/index.php/MCIJ/article/view/33951.